Maybe the recommendation of DE was based upon material available "way back
when" - and OLD old wives' tale - when sterility and general cleanliness
wasn't such a public issue.

--

Ray Barkalow First Rays Orchids
http://www.firstrays.com
Secure Online Ordering & Lots of Free Info!


"Ted Byers" wrote in message
...

"Ray @ First Rays Orchids" wrote in message
...
The problem is that the DE sold for filtration purposes has usually been
thoroughly cleaned before packaging, and the washing rounds off the
sharps
edges and points.

So then the question becomes "Where can you get DE that hasn't been so
abused?" I have not yet been able to find someone in any local garden
centre who even knows what it is, let alone a vendor able to provide it.

Cheers,

Ted